MathJax数学符号

发表于 2022-08-14 更新于 2023-07-03 分类于 MathJax 阅读次数：本文字数： 20k 阅读时长 ≈ 18 分钟

本篇文章简要地列出了MathJax中的所有符号（可能不全），并按照形状进行分类。

区间形状

区间类型	代码
$\langle\rangle$	`\langle\rangle`
$\lfloor\rfloor$	`\lfloor\rfloor`
$\lceil\rceil$	`\lceil\rceil`
$()$	`()`
$[]$	`[]`
$\{\}$	`\{\}`
$\lmoustache\rmoustache$	`\lmoustache\rmoustache`
$\lvert\rvert$	`\lvert\rvert`
$\lVert\rVert$	`\lVert\rVert`
$\lgroup\rgroup$	`\lgroup\rgroup`

希腊字母

大写		小写
$A$	`A`	$\alpha$	`\alpha`
$B$	`B`	$\beta$	`\beta`
$\Gamma,\varGamma$	`\Gamma,\varGamma`	$\gamma$	`\gamma`
$\Delta,\varDelta$	`\Delta,\varDelta`	$\delta$	`\delta`
$E$	`E`	$\epsilon,\varepsilon$	`\epsilon,\varepsilon`
$Z$	`Z`	$\zeta$	`\zeta`
$H$	`H`	$\eta$	`\eta`
$\Theta,\varTheta$	`\Theta,\varTheta`	$\theta,\vartheta$	`\theta,\vartheta`
$I$	`I`	$\iota$	`\iota`
$K$	`K`	$\kappa,\varkappa$	`\kappa,\varkappa`
$\Lambda,\varLambda$	`\Lambda,\varLambda`	$\lambda$	`\lambda`
$M$	`M`	$\mu$	`\mu`
$N$	`N`	$\nu$	`\nu`
$\Xi,\varXi$	`\Xi,\varXi`	$\xi$	`\xi`
$O$	`O`	$\omicron$	`\omicron`
$\Pi,\varPi$	`\Pi,\varPi`	$\pi,\varpi$	`\pi,\varpi`
$P$	`P`	$\rho,\varrho$	`\rho,\varrho`
$\Sigma,\varSigma$	`\Sigma,\varSigma`	$\sigma,\varsigma$	`\sigma,\varsigma`
$T$	`T`	$\tau$	`\tau`
$\Upsilon,\varUpsilon$	`\Upsilon,\varUpsilon`	$\upsilon$	`\upsilon`
$\Phi,\varPhi$	`\Phi,\varPhi`	$\phi,\varphi$	`\phi,\varphi`
$X$	`X`	$\chi$	`\chi`
$\Psi,\varPsi$	`\Psi,\varPsi`	$\psi$	`\psi`
$\Omega,\varOmega$	`\Omega,\varOmega`	$\omega$	`\omega`

希伯来字母

$\aleph$	`\aleph`
$\beth$	`\beth`
$\daleth$	`\daleth`
$\gimel$	`\gimel`

字体与注释

使用\mathxx{}时，公式中的所有字母将会转换成对应字体。而使用\textxx{}时，里面的特殊字符也不会被转义。

$ABCDEFGHIJKLMNOPQRSTUVWXYZ$	$abcdefghijklmnopqrstuvwxyz$	$0123456789$	`原始字体`
$\mathrm{ABCDEFGHIJKLMNOPQRSTUVWXYZ}$	$\mathrm{abcdefghijklmnopqrstuvwxyz}$	$\mathrm{0123456789}$	`\mathrm{}`
$\mathbf{ABCDEFGHIJKLMNOPQRSTUVWXYZ}$	$\mathbf{abcdefghijklmnopqrstuvwxyz}$	$\mathbf{0123456789}$	`\mathbf{}`
$\mathbb{ABCDEFGHIJKLMNOPQRSTUVWXYZ}$	$\mathbb{abcdefghijklmnopqrstuvwxyz}$	$\mathbb{0123456789}$	`\mathrm{}`
$\mathcal{ABCDEFGHIJKLMNOPQRSTUVWXYZ}$	$\mathcal{abcdefghijklmnopqrstuvwxyz}$	$\mathcal{0123456789}$	`\mathcal{}`
$\mathit{ABCDEFGHIJKLMNOPQRSTUVWXYZ}$	$\mathit{abcdefghijklmnopqrstuvwxyz}$	$\mathit{0123456789}$	`\mathit{}`
$\mathscr{ABCDEFGHIJKLMNOPQRSTUVWXYZ}$	$\mathscr{abcdefghijklmnopqrstuvwxyz}$	$\mathscr{0123456789}$	`\mathscr{}`
$\mathfrak{ABCDEFGHIJKLMNOPQRSTUVWXYZ}$	$\mathfrak{abcdefghijklmnopqrstuvwxyz}$	$\mathfrak{0123456789}$	`\mathfrak{}`
$\mathsf{ABCDEFGHIJKLMNOPQRSTUVWXYZ}$	$\mathsf{abcdefghijklmnopqrstuvwxyz}$	$\mathsf{0123456789}$	`\mathsf{}`
$\mathtt{ABCDEFGHIJKLMNOPQRSTUVWXYZ}$	$\mathtt{abcdefghijklmnopqrstuvwxyz}$	$\mathtt{0123456789}$	`\mathtt{}`
$\text{\alpha in text mode }\alpha$	`\text{}`
$\textrm{\alpha in textrm mode }\alpha$	`\textrm{}`
$\textbf{\alpha in textbf mode }\alpha$	`\textbf{}`
$\textit{\alpha in textit mode }\alpha$	`\textit{}`
$\textsf{\alpha in textsf mode }\alpha$	`\textsf{}`
$\texttt{\alpha in texttt mode }\alpha$	`\texttt{}`
$\boldsymbol{\alpha}\mathbf{\alpha}$	`\boldsymbol{\alpha}\mathbf{\alpha}`

颜色

命令\color{}{}中的第一个参数可以是颜色名称，也可以是RGB参数。第二个参数则是正式染色的文字。

展示	代码
$\color{black}{ABCDabcd1234}$	`\color{black}{ABCDabcd1234}`
$\color{grey}{ABCDabcd1234}$	`\color{grey}{ABCDabcd1234}`
$\color{silver}{ABCDabcd1234}$	`\color{silver}{ABCDabcd1234}`
$\color{white}{ABCDabcd1234}$	`\color{white}{ABCDabcd1234}`
$\color{maroon}{ABCDabcd1234}$	`\color{maroon}{ABCDabcd1234}`
$\color{red}{ABCDabcd1234}$	`\color{red}{ABCDabcd1234}`
$\color{yellow}{ABCDabcd1234}$	`\color{yellow}{ABCDabcd1234}`
$\color{lime}{ABCDabcd1234}$	`\color{lime}{ABCDabcd1234}`
$\color{olive}{ABCDabcd1234}$	`\color{olive}{ABCDabcd1234}`
$\color{green}{ABCDabcd1234}$	`\color{green}{ABCDabcd1234}`
$\color{teal}{ABCDabcd1234}$	`\color{teal}{ABCDabcd1234}`
$\color{auqa}{ABCDabcd1234}$	`\color{auqa}{ABCDabcd1234}`
$\color{blue}{ABCDabcd1234}$	`\color{blue}{ABCDabcd1234}`
$\color{navy}{ABCDabcd1234}$	`\color{navy}{ABCDabcd1234}`
$\color{purple}{ABCDabcd1234}$	`\color{purple}{ABCDabcd1234}`
$\color{fuchsia}{ABCDabcd1234}$	`\color{fuchsia}{ABCDabcd1234}`

模算术`\mod`的用法和比较

展示	代码
$x^2\equiv 1(\mod 5)$	`x^2\equiv 1(\mod 5)`
$x^2\equiv 1(\bmod 5)$	`x^2\equiv 1(\bmod 5)`
$x^2\equiv 1\pmod{5}$	`x^2\equiv 1\pmod{5}`

分数`\frac`的用法和比较

行内	行间	代码
$\frac{a-1}{b-1}$	$\displaystyle{\frac{a-1}{b-1}}$	`\frac{a-1}{b-1}`
$\cfrac{2}{1+\cfrac{2}{1+\cfrac{2}{1}}}$	$\displaystyle{\cfrac{2}{1+\cfrac{2}{1+\cfrac{2}{1}}}}$	`\cfrac{2}{1+\cfrac{2}{1+\cfrac{2}{1}}}`
$\dfrac{a-1}{b-1}$	$\displaystyle{\dfrac{a-1}{b-1}}$	`\dfrac{a-1}{b-1}`
$\tfrac{a-1}{b-1}$	$\displaystyle{\tfrac{a-1}{b-1}}$	`\tfrac{a-1}{b-1}`
${a-1 \over b-1}$	$\displaystyle{ {a-1 \over b-1} }$	`{a-1 \over b-1}`

组合数`\binom`的用法和比较（附上`\brace`和`\brack`）

行内	行间	代码
$\binom{n+1}{m+1}$	$\displaystyle{\binom{n+1}{m+1}}$	`\binom{n+1}{m+1}`
${n+1\choose m+1}$	$\displaystyle{ {n+1\choose m+1} }$	`{n+1\choose m+1}`
$\dbinom{n+1}{m+1}$	$\displaystyle{\dbinom{n+1}{m+1}}$	`\dbinom{n+1}{m+1}`
$\tbinom{n+1}{m+1}$	$\displaystyle{\tbinom{n+1}{m+1}}$	`\tbinom{n+1}{m+1}`
${n+1\brack m+1}$	$\displaystyle{ {n+1\brack m+1} }$	`{n+1\brack m+1}`
${n+1\brace m+1}$	$\displaystyle{ {n+1\brace m+1} }$	`{n+1\brace m+1}`

方框的用法和比较

展示	代码
$\boxed{x^3+y^3=z^3}$	`\boxed{x^3+y^3=z^3}`
$\boxed{abcd 1234}$	`\boxed{abcd 1234}`
$\fbox{abcd 1234}$	`\fbox{abcd 1234}`

占位符`\phantom`的用法和比较

展示	代码
$\begin{array}{l}\text{Side Angle Side}\\\text{S}\hphantom{\text{ ide}}\text{A}\hphantom{\text{ngle }}\text{S}\end{array}$	`\begin{array}{l} \text{Side Angle Side} \\ \text{S} \hphantom {\text{ ide}} \text{A} \hphantom{\text{ngle }} \text{S}\end{array}`
$\begin{matrix}1&-1\\ \phantom{}\\1&\phantom{-}1\end{matrix}$	`\begin{matrix}1&-1\\ \phantom{}\\1&\phantom{-}1\end{matrix}`
$\dbinom{\dfrac ab}c \dbinom{\vphantom{\dfrac ab}}c$	`\dbinom{\dfrac ab}c \dbinom{\vphantom{\dfrac ab}}c`

公式大小

展示	代码
${\tiny AB}$	`{\tiny AB}`
${\Tiny AB}$	`{\Tiny AB}`
$AB$	`AB`
$\large AB$	`\large AB`
$\Large AB$	`\Large AB`
$\LARGE AB$	`\LARGE AB`
${\huge AB}$	`{\huge AB}`
${\Huge AB}$	`{\Huge AB}`

其它基本符号

\#,\$,\%,\&,\_,\|

$\#,\$,\%,\&,\_,\|$

公式上下层符号

展示	代码
$\acute{123}$	`\acute{123}`
$\bar{123}$	`\bar{123}`
$\breve{123}$	`\breve{123}`
$\check{123}$	`\check{123}`
$\dot{123}$	`\dot{123}`
$\ddot{123}$	`\ddot{123}`
$\dddot{123}$	`\dddot{123}`
$\ddddot{123}$	`\ddddot{123}`
$\grave{123}$	`\grave{123}`
$\hat{123}$	`\hat{123}`
$\mathring{123}$	`\mathring{123}`
$\tilde{123}$	`\tilde{123}`
$\vec{123}$	`\vec{123}`
$\overleftarrow{123}$	`\overleftarrow{123}`
$\overrightarrow{123}$	`\overrightarrow{123}`
$\overleftrightarrow{123}$	`\overleftrightarrow{123}`
$\overline{123}$	`\overline{123}`
$\widehat{123}$	`\widehat{123}`
$\widetilde{123}$	`\widetilde{123}`
$\underline{123}$	`\underline{123}`
$\underset{123}{abc}$	`\underset{123}{abc}`
$\overset{123}{abc}$	`\overset{123}{abc}`
$\underbrace{123}_{abc}$	`\underbrace{123}_{abc}`
$\xleftarrow[123]{abc}$	`\xleftarrow[123]{abc}`
$\xrightarrow[123]{abc}$	`\xrightarrow[123]{abc}`

箭头

箭头	代码
$\uparrow,\downarrow,\leftarrow,\rightarrow$	`\uparrow,\downarrow,\leftarrow,\rightarrow`
$\Uparrow,\Downarrow,\Leftarrow,\Rightarrow$	`\Uparrow,\Downarrow,\Leftarrow,\Rightarrow`
$\upuparrows,\downdownarrows,\leftleftarrows,\rightrightarrows$	`\upuparrows,\downdownarrows,\leftleftarrows,\rightrightarrows`
$\nwarrow,\nearrow,\swarrow,\searrow$	`\nwarrow,\nearrow,\swarrow,\searrow`
$\upharpoonleft,\upharpoonright,\downharpoonleft,\downharpoonright$	`\upharpoonleft,\upharpoonright,\downharpoonleft,\downharpoonright`
$\leftharpoondown,\leftharpoonup,\rightharpoondown,\rightharpoonup$	`\leftharpoondown,\leftharpoonup,\rightharpoondown,\rightharpoonup`
$\longleftarrow,\longrightarrow,\longleftrightarrow$	`\longleftarrow,\longrightarrow,\longleftrightarrow`
$\Longleftarrow,\Longrightarrow,\Longleftrightarrow$	`\Longleftarrow,\Longrightarrow,\Longleftrightarrow`
$\nleftarrow,\nrightarrow,\nleftrightarrow$	`\nleftarrow,\nrightarrow,\nleftrightarrow`
$\nLeftarrow,\nRightarrow,\nLeftrightarrow$	`\nLeftarrow,\nRightarrow,\nLeftrightarrow`
$\leftrightarrow,\updownarrow$	`\leftrightarrow,\updownarrow`
$\Leftrightarrow,\Updownarrow$	`\Leftrightarrow,\Updownarrow`
$\twoheadleftarrow,\twoheadrightarrow$	`\twoheadleftarrow,\twoheadrightarrow`
$\hookleftarrow,\hookrightarrow$	`\hookleftarrow,\hookrightarrow`
$\Lleftarrow,\Rrightarrow$	`\Lleftarrow,\Rrightarrow`
$\Lsh,\Rsh$	`\Lsh,\Rsh`
$\dashleftarrow,\dashrightarrow$	`\dashleftarrow,\dashrightarrow`
$\looparrowleft,\looparrowright$	`\looparrowleft,\looparrowright`
$\leftarrowtail,\rightarrowtail$	`\leftarrowtail,\rightarrowtail`
$\circlearrowleft,\circlearrowright$	`\circlearrowleft,\circlearrowright`
$\curvearrowleft,\curvearrowright$	`\curvearrowleft,\curvearrowright`
$\leftrightarrows,\rightleftarrows$	`\leftrightarrows,\rightleftarrows`
$\rightleftharpoons,\leftrightharpoons$	`\rightleftharpoons,\leftrightharpoons`
$\longmapsto$	`\longmapsto`
$\mapsto$	`\mapsto`
$\leftrightsquigarrow,\rightsquigarrow$	`\leftrightsquigarrow,\rightsquigarrow`

点和省略号

展示	代码
$a\cdot b$	`a\cdot b`
$a\cdotp b$	`a\cdotp b`
$a\centerdot b$	`a\centerdot b`
$\cdots$	`\cdots`
$\ddots$	`\ddots`
$\dots$	`\dots`
$\ldotp$	`\ldotp`
$\ldots$	`\ldots`
$\vdots$	`\vdots`

函数

展示	代码
$\sin$	`\sin`	$\cos$	`\cos`	$\tan$	`\tan`
$\cot$	`\cot`	$\csc$	`\csc`	$\sec$	`\sec`
$\arccos$	`\arccos`	$\arcsin$	`\arcsin`	$\arctan$	`\arctan`
$\sinh$	`\sinh`	$\cosh$	`\cosh`	$\tanh$	`\tanh`
$\coth$	`\coth`	$\exp$	`\exp`	$\log$	`\log`
$\lg$	`\lg`	$\ln$	`\ln`	$\max$	`\max`
$\min$	`\min`	$\gcd$	`\gcd`

微积分与极限

展示	代码
$\nabla$	`\nabla`	$\partial$	`\partial`	$\prime,'$	`\prime,'`
$\inf$	`\inf`	$\int,\iint,\iiint,\iiiint$	`\int,\iint,\iiint,\iiiint`	$\oint$	`\oint`
$\lim$	`\lim`	$\liminf$	`\liminf`	$\limsup$	`\limsup`
$\injlim$	`\injlim`	$\projlim$	`\projlim`	$\varinjlim$	`\varinjlim`
$\varlimsup$	`\varlimsup`	$\varliminf$	`\varliminf`	$\varprojlim$	`\varprojlim`
$\infty$	`\infty`	$\idotsint$	`\idotsint`

类字母符号

展示	代码
$\Bbbk,\complement,\backepsilon,\Game,\digamma,\hbar,\hslash$	`\Bbbk,\complement,\backepsilon,\Game,\digamma,\hbar,\hslash`
$\Im,\imath,\jmath,\ell,\mho,\Re,\S,\top,\wp$	`\Im,\imath,\jmath,\ell,\mho,\Re,\S,\top,\wp`

集合

展示	代码
$\in,\notin,\ni,\owns$	`\in,\notin,\ni,\owns`
$\subset,\Subset,\subseteq,\subsetneq,\nsubseteq,\nsubseteqq$	`\subset,\Subset,\subseteq,\subsetneq,\nsubseteq,\nsubseteqq`
$\supset,\Supset,\supseteq,\supsetneq,\nsupseteq,\nsupseteqq$	`\supset,\Supset,\supseteq,\supsetneq,\nsupseteq,\nsupseteqq`
$\subseteqq,\subsetneqq,\varsubsetneq,\varsubsetneqq$	`\subseteqq,\subsetneqq,\varsubsetneq,\varsubsetneqq`
$\supseteqq,\supsetneqq,\varsupsetneq,\varsupsetneqq$	`\supseteqq,\supsetneqq,\varsupsetneq,\varsupsetneqq`
$\emptyset,\varnothing$	`\emptyset,\varnothing`

关系运算符

算术与逻辑运算符

展示	代码
$\circ,\bullet,\bigcirc$	`\circ,\bullet,\bigcirc`
$\cap,\Cap,\bigcap,\doublecap,\sqcap$	`\cap,\Cap,\bigcap,\doublecap,\sqcap`
$\cup,\Cup,\bigcup,\doublecup,\sqcup,\bigsqcup$	`\cup,\Cup,\bigcup,\doublecup,\sqcup,\bigsqcup`
$+,-,\pm,\mp,\dotplus,\uplus,\biguplus,\sum$	`+,-,\pm,\mp,\dotplus,\uplus,\biguplus,\sum`
$\ast,\times,\div,\divideontimes,\prod$	`\ast,\times,\div,\divideontimes,\prod`
$\boxplus,\boxminus,\boxtimes$	`\boxplus,\boxminus,\boxtimes`
$\odot,\bigodot,\ominus,\oplus,\bigoplus,\oslash,\otimes$	`\odot,\bigodot,\ominus,\oplus,\bigoplus,\oslash,\otimes`
$\sqrt{16}=\sqrt[3]{64}$	`\sqrt{16}=\sqrt[3]{64}`
$\lor,\vee,\bigvee,\veebar,\curlyvee$	`\lor,\vee,\bigvee,\veebar,\curlyvee`
$\land,\wedge,\barwedge,\bigwedge,\doublebarwedge,\curlywedge$	`\land,\wedge,\barwedge,\bigwedge,\doublebarwedge,\curlywedge`
$\lnot,\neg$	`\lnot,\neg`
$\because,\therefore$	`\because,\therefore`
$\forall,\exists,\nexists$	`\forall,\exists,\nexists`

几何符号

部分几何符号可能归入了特殊符号中。

展示	代码
$\angle,\measuredangle,\sphericalangle$	`\angle,\measuredangle,\sphericalangle`
$\perp,\bot$	`\perp,\bot`
$\mid,\nmid,\parallel,\nparallel$	`\mid,\nmid,\parallel,\nparallel`
$\shortmid,\shortparallel,\nshortmid,\nshortparallel$	`\shortmid,\shortparallel,\nshortmid,\nshortparallel`

特殊符号

展示	代码
$\bigtriangleup,\triangle,\vartriangle$	`\bigtriangleup,\triangle,\vartriangle`
$\bigtriangledown,\triangledown$	`\bigtriangledown,\triangledown`
$\triangleleft,\vartriangleleft,\lhd$	`\triangleleft,\vartriangleleft,\lhd`
$\triangleright,\vartriangleright,\rhd$	`\triangleright,\vartriangleright,\rhd`
$\bigstar,\blacklozenge,\blacksquare$	`\bigstar,\blacklozenge,\blacksquare`
$\blacktriangle,\blacktriangledown,\blacktriangleleft,\blacktriangleright$	`\blacktriangle,\blacktriangledown,\blacktriangleleft,\blacktriangleright`
$\Box,\square,\boxdot$	`\Box,\square,\boxdot`
$\circledast,\circledcirc,\circleddash,\circledR,\circledS$	`\circledast,\circledcirc,\circleddash,\circledR,\circledS`
$\dagger,\ddagger$	`\dagger,\ddagger`
$\diagdown,\diagup$	`\diagdown,\diagup`
$\diamond,\Diamond,\lozenge$	`\diamond,\Diamond,\lozenge`
$\heartsuit,\diamondsuit,\clubsuit,\spadesuit$	`\heartsuit,\diamondsuit,\clubsuit,\spadesuit`
$\flat,\natural,\sharp$	`\flat,\natural,\sharp`
$\checkmark,\surd$	`\checkmark,\surd`
$\smile,\frown,\asymp$	`\smile,\frown,\asymp`
$\ulcorner\urcorner$	`\ulcorner\urcorner`
$\llcorner\lrcorner$	`\llcorner\lrcorner`
$\LaTeX,\TeX$	`\LaTeX,\TeX`
$\Finv$	`\Finv`
$\maltese$	`\maltese`
$\backprime$	`\backprime`
$\between$	`\between`
$\multimap$	`\multimap`
$\pitchfork$	`\pitchfork`
$\star$	`\star`
$\yen$	`\yen`
$\intercal$	`\intercal`
$\wr$	`\wr`
$\backslash$	`\backslash`

其它未分类符号

展示	代码
$\leftthreetimes,\rightthreetimes$	`\leftthreetimes,\rightthreetimes`
$\coprod,\amalg$	`\coprod,\amalg`
$\sup$	`\sup`
$\arg$	`\arg`
$\deg$	`\deg`
$\dim$	`\dim`
$\hom$	`\hom`
$\ker$	`\ker`
$\Pr$	`\Pr`
$\det$	`\det`
$\ltimes\rtimes,\bowtie,\Join$	`\ltimes\rtimes,\bowtie,\Join`

用`\DeclareMathOperator`定义运算符

1 2	$\DeclareMathOperator{\lcm}{lcm} \lcm(4,6)=2$ $\lcm(12,18)=24$

$\DeclareMathOperator{\lcm}{lcm} \lcm(4,6)=2$ $\lcm(12,18)=24$

`\buildrel{} \over{}`

用于自创运算符，这个运算符拥有两行。

1	\buildrel{\rm def} \over{:=}

\[\buildrel{\rm def} \over{:=}\]

`\substack`

用于编写大型运算符的条件时分行。

1	\sum_{\substack{1\lt i\lt 3 \\1\le j\lt 5}}a_{ij}

\[\sum_{\substack{1\lt i\lt 3 \\1\le j\lt 5}}a_{ij}\]

`\begin ... \end`

`aligned`

\begin{aligned}
3x - 4y &= 5 \\
x + 7 &= -2y
\end{aligned}
\tag{3.1c}

\[\begin{aligned} 3x - 4y &= 5 \\ x + 7 &= -2y \end{aligned} \tag{3.1c}\]

`align`

\begin{align}
(a+b)^2 &= (a+b)(a+b)          \tag{1}  \\
        &= a^2 + ab + ba + b^2 \tag{2}  \\
        &= a^2 + 2ab + b^2     \tag{3}
\end{align}

\[\begin{align} (a+b)^2 &= (a+b)(a+b) \tag{1} \\ &= a^2 + ab + ba + b^2 \tag{2} \\ &= a^2 + 2ab + b^2 \tag{3} \end{align}\]

`array`

l,c,r分别表示当前一列是居左，居中，还是居右。如果有|，那么就代表隔开。

\begin{array}{lc|r}
aaa & bbb & ccc\\
d & e & f
\end{array}

\[\begin{array}{l|c|r} aaa & bbb & ccc\\ d & e & f \end{array}\]

`cases`

|x| =
\begin{cases}
x  & \text{ if } x\ge 0 \\
-x & \text{ if } x \lt 0
\end{cases}$$

\[|x| = \begin{cases} x & \text{ if } x\ge 0 \\ -x & \text{ if } x \lt 0 \end{cases}\]

`Bmatrix`

1	\begin{Bmatrix} a & b\\ c & d\end{Bmatrix}

\[\begin{Bmatrix} a & b\\ c & d\end{Bmatrix}\]

`bmatrix`

1	\begin{bmatrix} a & b\\ c & d\end{bmatrix}

\[\begin{bmatrix} a & b\\ c & d\end{bmatrix}\]

`matrix`

1	\begin{matrix} a & b\\ c & d\end{matrix}

\[\begin{matrix} a & b\\ c & d\end{matrix}\]

`pmatrix`

1	\begin{pmatrix} a & b\\ c & d\end{pmatrix}

\[\begin{pmatrix} a & b\\ c & d\end{pmatrix}\]

`vmatrix`

1	\begin{vmatrix} a & b\\ c & d\end{vmatrix}

\[\begin{vmatrix} a & b\\ c & d\end{vmatrix}\]

`Vmatrix`

1	\begin{Vmatrix} a & b\\ c & d\end{Vmatrix}

\[\begin{Vmatrix} a & b\\ c & d\end{Vmatrix}\]

`eqnarray`

\begin{eqnarray}
(x-1)^2 &=& (x-1)(x-1)      &=&  x^2-2x + 1 \\
(x-1)^3 &=& (x-1)(x-1)(x-1) &=&  (x-1)^2(x-1) 
\end{eqnarray}

\[\begin{eqnarray} (x-1)^2 &=& (x-1)(x-1) &=& x^2-2x + 1 \\ (x-1)^3 &=& (x-1)(x-1)(x-1) &=& (x-1)^2(x-1) \end{eqnarray}\]

其它

`\tag`

注意\tag只有某些情况下才可以使用，如\aligned不可以，\align可以。

\begin{align}
(a+b)^2 &= (a+b)(a+b)          \tag{1}  \\
        &= a^2 + ab + ba + b^2 \tag{2}  \\
        &= a^2 + 2ab + b^2     \tag{3}
\end{align}

\[\begin{align} (a+b)^2 &= (a+b)(a+b) \tag{1} \\ &= a^2 + ab + ba + b^2 \tag{2} \\ &= a^2 + 2ab + b^2 \tag{3} \end{align}\]

`\hline, \hdashline`

用于在矩阵中画横线，\hline前者为实线，\hdashline为虚线。

\hline
x_{11} & x_{12} \\
x_{21} & x_{22} \\
\hdashline
x_{31} & x_{32} 
\end{matrix}

\[\begin{matrix} \hline x_{11} & x_{12} \\ x_{21} & x_{22} \\ \hdashline x_{31} & x_{32} \end{matrix}\]

`\left`, `\right`和`\big`

根据括号内的公式高度，智能调整两侧括号的高度，一个\left必须和一个\right匹配。如果只想要其中一个，那么用\right.来代替。

展示	代码
$\left(1+2\right)=\left(\dfrac{1}{2}\right)$	`\left(1+2\right)=\left(\dfrac{1}{2}\right)`
$\left\lgroup 1+2\right\rgroup=\left\lgroup\dfrac{1}{2}\right\rgroup$	`\left\lgroup 1+2\right\rgroup=\left\lgroup\dfrac{1}{2}\right\rgroup`
$\left[1+2\right]=\left[\dfrac{1}{2}\right]$	`\left[1+2\right]=\left[\dfrac{1}{2}\right]`
$\left\{1+2\right\}=\left\{\dfrac{1}{2}\right\}$	`\left\{1+2\right\}=\left\{\dfrac{1}{2}\right\}`
$\left\uparrow 1+2\right\downarrow=\left\downarrow\dfrac{1}{2}\right\uparrow$	`\left\uparrow 1+2\right\downarrow=\left\downarrow\dfrac{1}{2}\right\uparrow`
$\left\Uparrow 1+2\right\Downarrow=\left\Downarrow\dfrac{1}{2}\right\Uparrow$	`\left\Uparrow 1+2\right\Downarrow=\left\Downarrow\dfrac{1}{2}\right\Uparrow`
$\left\updownarrow 1+2\right\Updownarrow=\left\Updownarrow\dfrac{1}{2}\right\updownarrow$	`\left\updownarrow 1+2\right\Updownarrow=\left\Updownarrow\dfrac{1}{2}\right\updownarrow`
$\left\vert 1+2\right\vert=\left\vert\dfrac{1}{2}\right\vert$	`\left\vert 1+2\right\vert=\left\vert\dfrac{1}{2}\right\vert`
$\left\Vert 1+2\right\Vert=\left\Vert\dfrac{1}{2}\right\Vert$	`\left\Vert 1+2\right\Vert=\left\Vert\dfrac{1}{2}\right\Vert`
$\left\bracevert 1+2\right\bracevert=\left\bracevert\dfrac{1}{2}\right\bracevert$	`\left\bracevert 1+2\right\bracevert=\left\bracevert\dfrac{1}{2}\right\bracevert`
$\left\lceil 1+2\right\rceil=\left\lceil\dfrac{1}{2}\right\rceil$	`\left\lceil 1+2\right\rceil=\left\lceil\dfrac{1}{2}\right\rceil`
$\left\lfloor 1+2\right\rfloor=\left\lfloor\dfrac{1}{2}\right\rfloor$	`\left\lfloor 1+2\right\rfloor=\left\lfloor\dfrac{1}{2}\right\rfloor`
$\left/ 1+2\right\backslash=\left/\dfrac{1}{2}\right\backslash$	`\left/ 1+2\right\backslash=\left/\dfrac{1}{2}\right\backslash`
$\left\lmoustache 1+2\right\rmoustache=\left\lmoustache\dfrac{1}{2}\right\rmoustache$	`\left\lmoustache 1+2\right\rmoustache=\left\lmoustache\dfrac{1}{2}\right\rmoustache`

也可以自行直接指定大小：

1	\Bigg[\bigg[\Big[\big[ [

\[\Bigg[\bigg[\Big[\big[ [\]

`\not`

在任何一个关系运算符前面添加一个\not，即可得到划斜线的运算符，如：

展示	代码
$\not\equiv$	`\not\equiv`
$\not=$	`\not=`
$\not\in$	`\not\in`

\(ABCDEFGHIJKLMNOPQRSTUVWXYZ\)	\(abcdefghijklmnopqrstuvwxyz\)	\(0123456789\)	`原始字体`
\(\mathrm{ABCDEFGHIJKLMNOPQRSTUVWXYZ}\)	\(\mathrm{abcdefghijklmnopqrstuvwxyz}\)	\(\mathrm{0123456789}\)	`\mathrm{}`
\(\mathbf{ABCDEFGHIJKLMNOPQRSTUVWXYZ}\)	\(\mathbf{abcdefghijklmnopqrstuvwxyz}\)	\(\mathbf{0123456789}\)	`\mathbf{}`
\(\mathbb{ABCDEFGHIJKLMNOPQRSTUVWXYZ}\)	\(\mathbb{abcdefghijklmnopqrstuvwxyz}\)	\(\mathbb{0123456789}\)	`\mathrm{}`
\(\mathcal{ABCDEFGHIJKLMNOPQRSTUVWXYZ}\)	\(\mathcal{abcdefghijklmnopqrstuvwxyz}\)	\(\mathcal{0123456789}\)	`\mathcal{}`
\(\mathit{ABCDEFGHIJKLMNOPQRSTUVWXYZ}\)	\(\mathit{abcdefghijklmnopqrstuvwxyz}\)	\(\mathit{0123456789}\)	`\mathit{}`
\(\mathscr{ABCDEFGHIJKLMNOPQRSTUVWXYZ}\)	\(\mathscr{abcdefghijklmnopqrstuvwxyz}\)	\(\mathscr{0123456789}\)	`\mathscr{}`
\(\mathfrak{ABCDEFGHIJKLMNOPQRSTUVWXYZ}\)	\(\mathfrak{abcdefghijklmnopqrstuvwxyz}\)	\(\mathfrak{0123456789}\)	`\mathfrak{}`
\(\mathsf{ABCDEFGHIJKLMNOPQRSTUVWXYZ}\)	\(\mathsf{abcdefghijklmnopqrstuvwxyz}\)	\(\mathsf{0123456789}\)	`\mathsf{}`
\(\mathtt{ABCDEFGHIJKLMNOPQRSTUVWXYZ}\)	\(\mathtt{abcdefghijklmnopqrstuvwxyz}\)	\(\mathtt{0123456789}\)	`\mathtt{}`
\(\text{\alpha in text mode }\alpha\)	`\text{}`
\(\textrm{\alpha in textrm mode }\alpha\)	`\textrm{}`
\(\textbf{\alpha in textbf mode }\alpha\)	`\textbf{}`
\(\textit{\alpha in textit mode }\alpha\)	`\textit{}`
\(\textsf{\alpha in textsf mode }\alpha\)	`\textsf{}`
\(\texttt{\alpha in texttt mode }\alpha\)	`\texttt{}`
\(\boldsymbol{\alpha}\mathbf{\alpha}\)	`\boldsymbol{\alpha}\mathbf{\alpha}`

行内	行间	代码
\(\frac{a-1}{b-1}\)	\(\displaystyle{\frac{a-1}{b-1}}\)	`\frac{a-1}{b-1}`
\(\cfrac{2}{1+\cfrac{2}{1+\cfrac{2}{1}}}\)	\(\displaystyle{\cfrac{2}{1+\cfrac{2}{1+\cfrac{2}{1}}}}\)	`\cfrac{2}{1+\cfrac{2}{1+\cfrac{2}{1}}}`
\(\dfrac{a-1}{b-1}\)	\(\displaystyle{\dfrac{a-1}{b-1}}\)	`\dfrac{a-1}{b-1}`
\(\tfrac{a-1}{b-1}\)	\(\displaystyle{\tfrac{a-1}{b-1}}\)	`\tfrac{a-1}{b-1}`
\({a-1 \over b-1}\)	\(\displaystyle{ {a-1 \over b-1} }\)	`{a-1 \over b-1}`

行内	行间	代码
\(\binom{n+1}{m+1}\)	\(\displaystyle{\binom{n+1}{m+1}}\)	`\binom{n+1}{m+1}`
\({n+1\choose m+1}\)	\(\displaystyle{ {n+1\choose m+1} }\)	`{n+1\choose m+1}`
\(\dbinom{n+1}{m+1}\)	\(\displaystyle{\dbinom{n+1}{m+1}}\)	`\dbinom{n+1}{m+1}`
\(\tbinom{n+1}{m+1}\)	\(\displaystyle{\tbinom{n+1}{m+1}}\)	`\tbinom{n+1}{m+1}`
\({n+1\brack m+1}\)	\(\displaystyle{ {n+1\brack m+1} }\)	`{n+1\brack m+1}`
\({n+1\brace m+1}\)	\(\displaystyle{ {n+1\brace m+1} }\)	`{n+1\brace m+1}`

区间类型	代码
\(\langle\rangle\)	`\langle\rangle`
\(\lfloor\rfloor\)	`\lfloor\rfloor`
\(\lceil\rceil\)	`\lceil\rceil`
\(()\)	`()`
\([]\)	`[]`
\(\{\}\)	`\{\}`
\(\lmoustache\rmoustache\)	`\lmoustache\rmoustache`
\(\lvert\rvert\)	`\lvert\rvert`
\(\lVert\rVert\)	`\lVert\rVert`
\(\lgroup\rgroup\)	`\lgroup\rgroup`

大写		小写
\(A\)	`A`	\(\alpha\)	`\alpha`
\(B\)	`B`	\(\beta\)	`\beta`
\(\Gamma,\varGamma\)	`\Gamma,\varGamma`	\(\gamma\)	`\gamma`
\(\Delta,\varDelta\)	`\Delta,\varDelta`	\(\delta\)	`\delta`
\(E\)	`E`	\(\epsilon,\varepsilon\)	`\epsilon,\varepsilon`
\(Z\)	`Z`	\(\zeta\)	`\zeta`
\(H\)	`H`	\(\eta\)	`\eta`
\(\Theta,\varTheta\)	`\Theta,\varTheta`	\(\theta,\vartheta\)	`\theta,\vartheta`
\(I\)	`I`	\(\iota\)	`\iota`
\(K\)	`K`	\(\kappa,\varkappa\)	`\kappa,\varkappa`
\(\Lambda,\varLambda\)	`\Lambda,\varLambda`	\(\lambda\)	`\lambda`
\(M\)	`M`	\(\mu\)	`\mu`
\(N\)	`N`	\(\nu\)	`\nu`
\(\Xi,\varXi\)	`\Xi,\varXi`	\(\xi\)	`\xi`
\(O\)	`O`	\(\omicron\)	`\omicron`
\(\Pi,\varPi\)	`\Pi,\varPi`	\(\pi,\varpi\)	`\pi,\varpi`
\(P\)	`P`	\(\rho,\varrho\)	`\rho,\varrho`
\(\Sigma,\varSigma\)	`\Sigma,\varSigma`	\(\sigma,\varsigma\)	`\sigma,\varsigma`
\(T\)	`T`	\(\tau\)	`\tau`
\(\Upsilon,\varUpsilon\)	`\Upsilon,\varUpsilon`	\(\upsilon\)	`\upsilon`
\(\Phi,\varPhi\)	`\Phi,\varPhi`	\(\phi,\varphi\)	`\phi,\varphi`
\(X\)	`X`	\(\chi\)	`\chi`
\(\Psi,\varPsi\)	`\Psi,\varPsi`	\(\psi\)	`\psi`
\(\Omega,\varOmega\)	`\Omega,\varOmega`	\(\omega\)	`\omega`

\(\aleph\)	`\aleph`
\(\beth\)	`\beth`
\(\daleth\)	`\daleth`
\(\gimel\)	`\gimel`

展示	代码
\(\color{black}{ABCDabcd1234}\)	`\color{black}{ABCDabcd1234}`
\(\color{grey}{ABCDabcd1234}\)	`\color{grey}{ABCDabcd1234}`
\(\color{silver}{ABCDabcd1234}\)	`\color{silver}{ABCDabcd1234}`
\(\color{white}{ABCDabcd1234}\)	`\color{white}{ABCDabcd1234}`
\(\color{maroon}{ABCDabcd1234}\)	`\color{maroon}{ABCDabcd1234}`
\(\color{red}{ABCDabcd1234}\)	`\color{red}{ABCDabcd1234}`
\(\color{yellow}{ABCDabcd1234}\)	`\color{yellow}{ABCDabcd1234}`
\(\color{lime}{ABCDabcd1234}\)	`\color{lime}{ABCDabcd1234}`
\(\color{olive}{ABCDabcd1234}\)	`\color{olive}{ABCDabcd1234}`
\(\color{green}{ABCDabcd1234}\)	`\color{green}{ABCDabcd1234}`
\(\color{teal}{ABCDabcd1234}\)	`\color{teal}{ABCDabcd1234}`
\(\color{auqa}{ABCDabcd1234}\)	`\color{auqa}{ABCDabcd1234}`
\(\color{blue}{ABCDabcd1234}\)	`\color{blue}{ABCDabcd1234}`
\(\color{navy}{ABCDabcd1234}\)	`\color{navy}{ABCDabcd1234}`
\(\color{purple}{ABCDabcd1234}\)	`\color{purple}{ABCDabcd1234}`
\(\color{fuchsia}{ABCDabcd1234}\)	`\color{fuchsia}{ABCDabcd1234}`

展示	代码
\(x^2\equiv 1(\mod 5)\)	`x^2\equiv 1(\mod 5)`
\(x^2\equiv 1(\bmod 5)\)	`x^2\equiv 1(\bmod 5)`
\(x^2\equiv 1\pmod{5}\)	`x^2\equiv 1\pmod{5}`

展示	代码
\(\boxed{x^3+y^3=z^3}\)	`\boxed{x^3+y^3=z^3}`
\(\boxed{abcd 1234}\)	`\boxed{abcd 1234}`
\(\fbox{abcd 1234}\)	`\fbox{abcd 1234}`

展示	代码
\(\begin{array}{l}\text{Side Angle Side}\\\text{S}\hphantom{\text{ ide}}\text{A}\hphantom{\text{ngle }}\text{S}\end{array}\)	`\begin{array}{l} \text{Side Angle Side} \\ \text{S} \hphantom {\text{ ide}} \text{A} \hphantom{\text{ngle }} \text{S}\end{array}`
\(\begin{matrix}1&-1\\ \phantom{}\\1&\phantom{-}1\end{matrix}\)	`\begin{matrix}1&-1\\ \phantom{}\\1&\phantom{-}1\end{matrix}`
\(\dbinom{\dfrac ab}c \dbinom{\vphantom{\dfrac ab}}c\)	`\dbinom{\dfrac ab}c \dbinom{\vphantom{\dfrac ab}}c`

展示	代码
\({\tiny AB}\)	`{\tiny AB}`
\({\Tiny AB}\)	`{\Tiny AB}`
\(AB\)	`AB`
\(\large AB\)	`\large AB`
\(\Large AB\)	`\Large AB`
\(\LARGE AB\)	`\LARGE AB`
\({\huge AB}\)	`{\huge AB}`
\({\Huge AB}\)	`{\Huge AB}`

展示	代码
\(\acute{123}\)	`\acute{123}`
\(\bar{123}\)	`\bar{123}`
\(\breve{123}\)	`\breve{123}`
\(\check{123}\)	`\check{123}`
\(\dot{123}\)	`\dot{123}`
\(\ddot{123}\)	`\ddot{123}`
\(\dddot{123}\)	`\dddot{123}`
\(\ddddot{123}\)	`\ddddot{123}`
\(\grave{123}\)	`\grave{123}`
\(\hat{123}\)	`\hat{123}`
\(\mathring{123}\)	`\mathring{123}`
\(\tilde{123}\)	`\tilde{123}`
\(\vec{123}\)	`\vec{123}`
\(\overleftarrow{123}\)	`\overleftarrow{123}`
\(\overrightarrow{123}\)	`\overrightarrow{123}`
\(\overleftrightarrow{123}\)	`\overleftrightarrow{123}`
\(\overline{123}\)	`\overline{123}`
\(\widehat{123}\)	`\widehat{123}`
\(\widetilde{123}\)	`\widetilde{123}`
\(\underline{123}\)	`\underline{123}`
\(\underset{123}{abc}\)	`\underset{123}{abc}`
\(\overset{123}{abc}\)	`\overset{123}{abc}`
\(\underbrace{123}_{abc}\)	`\underbrace{123}_{abc}`
\(\xleftarrow[123]{abc}\)	`\xleftarrow[123]{abc}`
\(\xrightarrow[123]{abc}\)	`\xrightarrow[123]{abc}`

箭头	代码
\(\uparrow,\downarrow,\leftarrow,\rightarrow\)	`\uparrow,\downarrow,\leftarrow,\rightarrow`
\(\Uparrow,\Downarrow,\Leftarrow,\Rightarrow\)	`\Uparrow,\Downarrow,\Leftarrow,\Rightarrow`
\(\upuparrows,\downdownarrows,\leftleftarrows,\rightrightarrows\)	`\upuparrows,\downdownarrows,\leftleftarrows,\rightrightarrows`
\(\nwarrow,\nearrow,\swarrow,\searrow\)	`\nwarrow,\nearrow,\swarrow,\searrow`
\(\upharpoonleft,\upharpoonright,\downharpoonleft,\downharpoonright\)	`\upharpoonleft,\upharpoonright,\downharpoonleft,\downharpoonright`
\(\leftharpoondown,\leftharpoonup,\rightharpoondown,\rightharpoonup\)	`\leftharpoondown,\leftharpoonup,\rightharpoondown,\rightharpoonup`
\(\longleftarrow,\longrightarrow,\longleftrightarrow\)	`\longleftarrow,\longrightarrow,\longleftrightarrow`
\(\Longleftarrow,\Longrightarrow,\Longleftrightarrow\)	`\Longleftarrow,\Longrightarrow,\Longleftrightarrow`
\(\nleftarrow,\nrightarrow,\nleftrightarrow\)	`\nleftarrow,\nrightarrow,\nleftrightarrow`
\(\nLeftarrow,\nRightarrow,\nLeftrightarrow\)	`\nLeftarrow,\nRightarrow,\nLeftrightarrow`
\(\leftrightarrow,\updownarrow\)	`\leftrightarrow,\updownarrow`
\(\Leftrightarrow,\Updownarrow\)	`\Leftrightarrow,\Updownarrow`
\(\twoheadleftarrow,\twoheadrightarrow\)	`\twoheadleftarrow,\twoheadrightarrow`
\(\hookleftarrow,\hookrightarrow\)	`\hookleftarrow,\hookrightarrow`
\(\Lleftarrow,\Rrightarrow\)	`\Lleftarrow,\Rrightarrow`
\(\Lsh,\Rsh\)	`\Lsh,\Rsh`
\(\dashleftarrow,\dashrightarrow\)	`\dashleftarrow,\dashrightarrow`
\(\looparrowleft,\looparrowright\)	`\looparrowleft,\looparrowright`
\(\leftarrowtail,\rightarrowtail\)	`\leftarrowtail,\rightarrowtail`
\(\circlearrowleft,\circlearrowright\)	`\circlearrowleft,\circlearrowright`
\(\curvearrowleft,\curvearrowright\)	`\curvearrowleft,\curvearrowright`
\(\leftrightarrows,\rightleftarrows\)	`\leftrightarrows,\rightleftarrows`
\(\rightleftharpoons,\leftrightharpoons\)	`\rightleftharpoons,\leftrightharpoons`
\(\longmapsto\)	`\longmapsto`
\(\mapsto\)	`\mapsto`
\(\leftrightsquigarrow,\rightsquigarrow\)	`\leftrightsquigarrow,\rightsquigarrow`

展示	代码
\(a\cdot b\)	`a\cdot b`
\(a\cdotp b\)	`a\cdotp b`
\(a\centerdot b\)	`a\centerdot b`
\(\cdots\)	`\cdots`
\(\ddots\)	`\ddots`
\(\dots\)	`\dots`
\(\ldotp\)	`\ldotp`
\(\ldots\)	`\ldots`
\(\vdots\)	`\vdots`

展示	代码
\(>,\ge,\geqq,\geqslant,\gg,\ggg,\gt,\gtrdot,\eqslantgtr\)	`>,\ge,\geqq,\geqslant,\gg,\ggg,\gt,\gtrdot,\eqslantgtr`
\(<,\le,\leqq,\leqslant,\ll,\lll,\lt,\lessdot,\eqslantless\)	`<,\le,\leqq,\leqslant,\ll,\lll,\lt,\lessdot,\eqslantless`
\(\gtrapprox,\gnapprox,\gneq,\gneqq,\gvertneqq,\gtrsim,\gnsim\)	`\gtrapprox,\gnapprox,\gneq,\gneqq,\gvertneqq,\gtrsim,\gnsim`
\(\lessapprox,\lnapprox,\lneq,\lneqq,\lvertneqq,\lesssim,\lnsim\)	`\lessapprox,\lnapprox,\lneq,\lneqq,\lvertneqq,\lesssim,\lnsim`
\(\gtreqless,\gtreqqless,\gtrless,\lesseqgtr,\lesseqqgtr,\lessgtr\)	`\gtreqless,\gtreqqless,\gtrless,\lesseqgtr,\lesseqqgtr,\lessgtr`
\(\ngeq,\ngeqq,\ngeqslant,\ngtr,\nleq,\nleqq,\nleqslant,\nless\)	`\ngeq,\ngeqq,\ngeqslant,\ngtr,\nleq,\nleqq,\nleqslant,\nless`
\(\sqsubset,\sqsupset,\sqsubseteq,\sqsupseteq\)	`\sqsubset,\sqsupset,\sqsubseteq,\sqsupseteq`
\(\prec,\preccurlyeq,\curlyeqprec,\preceq,\precsim,\precapprox\)	`\prec,\preccurlyeq,\curlyeqprec,\preceq,\precsim,\precapprox`
\(\precnapprox,\precneqq,\precnsim,\nprec,\npreceq\)	`\precnapprox,\precneqq,\precnsim,\nprec,\npreceq`
\(\succ,\curlyeqsucc,\succcurlyeq,\succeq,\succsim,\succapprox\)	`\succ,\curlyeqsucc,\succcurlyeq,\succeq,\succsim,\succapprox`
\(\succnapprox,\succneqq,\succnsim,\nsucc,\nsucceq\)	`\succnapprox,\succneqq,\succnsim,\nsucc,\nsucceq`
\(\sim,\nsim,\thicksim,\backsim,\simeq,\backsimeq,\eqsim\)	`\sim,\nsim,\thicksim,\backsim,\simeq,\backsimeq,\eqsim`
\(\approx,\thickapprox,\approxeq\)	`\approx,\thickapprox,\approxeq`
\(\vdash,\dashv,\Vdash,\vDash,\Vvdash,\models\)	`\vdash,\dashv,\Vdash,\vDash,\Vvdash,\models`
\(\nvdash,\nVdash,\nVDash,\nvDash\)	`\nvdash,\nVdash,\nVDash,\nvDash`
\(\ntriangleleft,\ntriangleright\)	`\ntriangleleft,\ntriangleright`
\(\trianglelefteq,\trianglerighteq,\ntrianglelefteq,\ntrianglerighteq\)	`\trianglelefteq,\trianglerighteq,\ntrianglelefteq,\ntrianglerighteq`
\(=,\eqcirc,\equiv,\ne,\cong,\ncong\)	`=,\eqcirc,\equiv,\ne,\cong,\ncong`
\(\Doteq,\doteq,\triangleq\)	`\Doteq,\doteq,\triangleq`
\(\Bumpeq,\bumpeq,\circeq\)	`\Bumpeq,\bumpeq,\circeq`
\(\propto,\varpropto\)	`\propto,\varpropto`

展示	代码
\(\sin\)	`\sin`	\(\cos\)	`\cos`	\(\tan\)	`\tan`
\(\cot\)	`\cot`	\(\csc\)	`\csc`	\(\sec\)	`\sec`
\(\arccos\)	`\arccos`	\(\arcsin\)	`\arcsin`	\(\arctan\)	`\arctan`
\(\sinh\)	`\sinh`	\(\cosh\)	`\cosh`	\(\tanh\)	`\tanh`
\(\coth\)	`\coth`	\(\exp\)	`\exp`	\(\log\)	`\log`
\(\lg\)	`\lg`	\(\ln\)	`\ln`	\(\max\)	`\max`
\(\min\)	`\min`	\(\gcd\)	`\gcd`

展示	代码
\(\nabla\)	`\nabla`	\(\partial\)	`\partial`	\(\prime,'\)	`\prime,'`
\(\inf\)	`\inf`	\(\int,\iint,\iiint,\iiiint\)	`\int,\iint,\iiint,\iiiint`	\(\oint\)	`\oint`
\(\lim\)	`\lim`	\(\liminf\)	`\liminf`	\(\limsup\)	`\limsup`
\(\injlim\)	`\injlim`	\(\projlim\)	`\projlim`	\(\varinjlim\)	`\varinjlim`
\(\varlimsup\)	`\varlimsup`	\(\varliminf\)	`\varliminf`	\(\varprojlim\)	`\varprojlim`
\(\infty\)	`\infty`	\(\idotsint\)	`\idotsint`

展示	代码
\(\Bbbk,\complement,\backepsilon,\Game,\digamma,\hbar,\hslash\)	`\Bbbk,\complement,\backepsilon,\Game,\digamma,\hbar,\hslash`
\(\Im,\imath,\jmath,\ell,\mho,\Re,\S,\top,\wp\)	`\Im,\imath,\jmath,\ell,\mho,\Re,\S,\top,\wp`

展示	代码
\(\in,\notin,\ni,\owns\)	`\in,\notin,\ni,\owns`
\(\subset,\Subset,\subseteq,\subsetneq,\nsubseteq,\nsubseteqq\)	`\subset,\Subset,\subseteq,\subsetneq,\nsubseteq,\nsubseteqq`
\(\supset,\Supset,\supseteq,\supsetneq,\nsupseteq,\nsupseteqq\)	`\supset,\Supset,\supseteq,\supsetneq,\nsupseteq,\nsupseteqq`
\(\subseteqq,\subsetneqq,\varsubsetneq,\varsubsetneqq\)	`\subseteqq,\subsetneqq,\varsubsetneq,\varsubsetneqq`
\(\supseteqq,\supsetneqq,\varsupsetneq,\varsupsetneqq\)	`\supseteqq,\supsetneqq,\varsupsetneq,\varsupsetneqq`
\(\emptyset,\varnothing\)	`\emptyset,\varnothing`

展示	代码
\(\circ,\bullet,\bigcirc\)	`\circ,\bullet,\bigcirc`
\(\cap,\Cap,\bigcap,\doublecap,\sqcap\)	`\cap,\Cap,\bigcap,\doublecap,\sqcap`
\(\cup,\Cup,\bigcup,\doublecup,\sqcup,\bigsqcup\)	`\cup,\Cup,\bigcup,\doublecup,\sqcup,\bigsqcup`
\(+,-,\pm,\mp,\dotplus,\uplus,\biguplus,\sum\)	`+,-,\pm,\mp,\dotplus,\uplus,\biguplus,\sum`
\(\ast,\times,\div,\divideontimes,\prod\)	`\ast,\times,\div,\divideontimes,\prod`
\(\boxplus,\boxminus,\boxtimes\)	`\boxplus,\boxminus,\boxtimes`
\(\odot,\bigodot,\ominus,\oplus,\bigoplus,\oslash,\otimes\)	`\odot,\bigodot,\ominus,\oplus,\bigoplus,\oslash,\otimes`
\(\sqrt{16}=\sqrt[3]{64}\)	`\sqrt{16}=\sqrt[3]{64}`
\(\lor,\vee,\bigvee,\veebar,\curlyvee\)	`\lor,\vee,\bigvee,\veebar,\curlyvee`
\(\land,\wedge,\barwedge,\bigwedge,\doublebarwedge,\curlywedge\)	`\land,\wedge,\barwedge,\bigwedge,\doublebarwedge,\curlywedge`
\(\lnot,\neg\)	`\lnot,\neg`
\(\because,\therefore\)	`\because,\therefore`
\(\forall,\exists,\nexists\)	`\forall,\exists,\nexists`

展示	代码
\(\angle,\measuredangle,\sphericalangle\)	`\angle,\measuredangle,\sphericalangle`
\(\perp,\bot\)	`\perp,\bot`
\(\mid,\nmid,\parallel,\nparallel\)	`\mid,\nmid,\parallel,\nparallel`
\(\shortmid,\shortparallel,\nshortmid,\nshortparallel\)	`\shortmid,\shortparallel,\nshortmid,\nshortparallel`

展示	代码
\(\bigtriangleup,\triangle,\vartriangle\)	`\bigtriangleup,\triangle,\vartriangle`
\(\bigtriangledown,\triangledown\)	`\bigtriangledown,\triangledown`
\(\triangleleft,\vartriangleleft,\lhd\)	`\triangleleft,\vartriangleleft,\lhd`
\(\triangleright,\vartriangleright,\rhd\)	`\triangleright,\vartriangleright,\rhd`
\(\bigstar,\blacklozenge,\blacksquare\)	`\bigstar,\blacklozenge,\blacksquare`
\(\blacktriangle,\blacktriangledown,\blacktriangleleft,\blacktriangleright\)	`\blacktriangle,\blacktriangledown,\blacktriangleleft,\blacktriangleright`
\(\Box,\square,\boxdot\)	`\Box,\square,\boxdot`
\(\circledast,\circledcirc,\circleddash,\circledR,\circledS\)	`\circledast,\circledcirc,\circleddash,\circledR,\circledS`
\(\dagger,\ddagger\)	`\dagger,\ddagger`
\(\diagdown,\diagup\)	`\diagdown,\diagup`
\(\diamond,\Diamond,\lozenge\)	`\diamond,\Diamond,\lozenge`
\(\heartsuit,\diamondsuit,\clubsuit,\spadesuit\)	`\heartsuit,\diamondsuit,\clubsuit,\spadesuit`
\(\flat,\natural,\sharp\)	`\flat,\natural,\sharp`
\(\checkmark,\surd\)	`\checkmark,\surd`
\(\smile,\frown,\asymp\)	`\smile,\frown,\asymp`
\(\ulcorner\urcorner\)	`\ulcorner\urcorner`
\(\llcorner\lrcorner\)	`\llcorner\lrcorner`
\(\LaTeX,\TeX\)	`\LaTeX,\TeX`
\(\Finv\)	`\Finv`
\(\maltese\)	`\maltese`
\(\backprime\)	`\backprime`
\(\between\)	`\between`
\(\multimap\)	`\multimap`
\(\pitchfork\)	`\pitchfork`
\(\star\)	`\star`
\(\yen\)	`\yen`
\(\intercal\)	`\intercal`
\(\wr\)	`\wr`
\(\backslash\)	`\backslash`

展示	代码
\(\leftthreetimes,\rightthreetimes\)	`\leftthreetimes,\rightthreetimes`
\(\coprod,\amalg\)	`\coprod,\amalg`
\(\sup\)	`\sup`
\(\arg\)	`\arg`
\(\deg\)	`\deg`
\(\dim\)	`\dim`
\(\hom\)	`\hom`
\(\ker\)	`\ker`
\(\Pr\)	`\Pr`
\(\det\)	`\det`
\(\ltimes\rtimes,\bowtie,\Join\)	`\ltimes\rtimes,\bowtie,\Join`

展示	代码
\(\left(1+2\right)=\left(\dfrac{1}{2}\right)\)	`\left(1+2\right)=\left(\dfrac{1}{2}\right)`
\(\left\lgroup 1+2\right\rgroup=\left\lgroup\dfrac{1}{2}\right\rgroup\)	`\left\lgroup 1+2\right\rgroup=\left\lgroup\dfrac{1}{2}\right\rgroup`
\(\left[1+2\right]=\left[\dfrac{1}{2}\right]\)	`\left[1+2\right]=\left[\dfrac{1}{2}\right]`
\(\left\{1+2\right\}=\left\{\dfrac{1}{2}\right\}\)	`\left\{1+2\right\}=\left\{\dfrac{1}{2}\right\}`
\(\left\uparrow 1+2\right\downarrow=\left\downarrow\dfrac{1}{2}\right\uparrow\)	`\left\uparrow 1+2\right\downarrow=\left\downarrow\dfrac{1}{2}\right\uparrow`
\(\left\Uparrow 1+2\right\Downarrow=\left\Downarrow\dfrac{1}{2}\right\Uparrow\)	`\left\Uparrow 1+2\right\Downarrow=\left\Downarrow\dfrac{1}{2}\right\Uparrow`
\(\left\updownarrow 1+2\right\Updownarrow=\left\Updownarrow\dfrac{1}{2}\right\updownarrow\)	`\left\updownarrow 1+2\right\Updownarrow=\left\Updownarrow\dfrac{1}{2}\right\updownarrow`
\(\left\vert 1+2\right\vert=\left\vert\dfrac{1}{2}\right\vert\)	`\left\vert 1+2\right\vert=\left\vert\dfrac{1}{2}\right\vert`
\(\left\Vert 1+2\right\Vert=\left\Vert\dfrac{1}{2}\right\Vert\)	`\left\Vert 1+2\right\Vert=\left\Vert\dfrac{1}{2}\right\Vert`
\(\left\bracevert 1+2\right\bracevert=\left\bracevert\dfrac{1}{2}\right\bracevert\)	`\left\bracevert 1+2\right\bracevert=\left\bracevert\dfrac{1}{2}\right\bracevert`
\(\left\lceil 1+2\right\rceil=\left\lceil\dfrac{1}{2}\right\rceil\)	`\left\lceil 1+2\right\rceil=\left\lceil\dfrac{1}{2}\right\rceil`
\(\left\lfloor 1+2\right\rfloor=\left\lfloor\dfrac{1}{2}\right\rfloor\)	`\left\lfloor 1+2\right\rfloor=\left\lfloor\dfrac{1}{2}\right\rfloor`
\(\left/ 1+2\right\backslash=\left/\dfrac{1}{2}\right\backslash\)	`\left/ 1+2\right\backslash=\left/\dfrac{1}{2}\right\backslash`
\(\left\lmoustache 1+2\right\rmoustache=\left\lmoustache\dfrac{1}{2}\right\rmoustache\)	`\left\lmoustache 1+2\right\rmoustache=\left\lmoustache\dfrac{1}{2}\right\rmoustache`

展示	代码
\(\not\equiv\)	`\not\equiv`
\(\not=\)	`\not=`
\(\not\in\)	`\not\in`

区间形状

希腊字母

希伯来字母

字体与注释

颜色

模算术\mod的用法和比较

分数\frac的用法和比较

组合数\binom的用法和比较（附上\brace和\brack）

方框的用法和比较

占位符\phantom的用法和比较

公式大小

其它基本符号

公式上下层符号

箭头

点和省略号

函数

微积分与极限

类字母符号

集合

关系运算符

算术与逻辑运算符

几何符号

特殊符号

其它未分类符号

用\DeclareMathOperator定义运算符

\buildrel{} \over{}

\substack

\begin ... \end

aligned

align

array

cases

Bmatrix

bmatrix

matrix

pmatrix

vmatrix

Vmatrix

eqnarray

其它

\tag

\hline, \hdashline

\left, \right和\big

\not